PSM

Fault code 1542

Rate-of-turn sensor

Diagnostic conditions
- Ignition on
- Internal PSM control module function test

Possible cause of fault

Actual value of function integrated in the combination sensor:
- Rate-of-turn sensor

is evaluated and displays an implausible value (implausible signal).

- Internal CAN: Wire faulty (no signal/communication)
- Short circuit to ground (electrical fault in electric circuit)
- Short circuit to B+ (electrical fault in electric circuit)
- Open circuit in circuit to control module (electrical fault in electric circuit)
- Rate-of-turn sensor faulty

NOTE: The transverse and axial acceleration sensor and the rate-of-turn sensor are integrated into the combination sensor housing. If a fault is detected in one of these three sensors, the combination sensor must be replaced. The integrated transverse and axial acceleration sensor must be calibrated after replacement.

Affected pins
PSM control module plug:
- Pin 6 'voltage
- Pin 24 'ground'
- Pin 25 'internal CAN (low)'
- Pin 29 'internal CAN (high)'

Diagnosis/troubleshooting PSM 0101

NOTE:
Visual inspection: In the next troubleshooting section please check first that the affected pins on the PSM control module plug connection and the pins on the combination sensor plug connection are neither damaged nor corroded. The wiring of the affected components must also be checked for external damage. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wire.